@charset "UTF-8";
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Helvetica Neue", Helvetica, sans-serif;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    background: #3498DB;
    position: relative;
}

#nav {
    position: absolute;
    width: 94%;
    top: 50px;
    left: 3%;
    z-index: 200;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, .5);
}

#nav ul li {
    list-style: none;
    display: inline-block;
    margin-right: 2em;
}

#nav ul li a {
    color: rgba(255, 255, 255, .8);
    font-size: 1.25em;
    text-transform: uppercase;
    text-decoration: none;
    transition: all .5s;
    -webkit-transition: all .5s;
}

#nav ul li a:hover {
    color: #FFF;
}

section {
    width: 100%;
    height: 100%;
    position: absolute;
}

#about, #service, #portfolio {
    top: 100%;
}

#home {
    background: url(../images/homebg.png) no-repeat right bottom;
}

#about {
    background: url(../images/aboutbg.png) no-repeat left bottom;
}

#service {
    background: url(../images/servicebg.png) no-repeat right bottom;
}

#portfolio {
    background: url(../images/portfoliobg.png) no-repeat right bottom;
}

#home h1 {
    font-size: 8em;
    text-transform: uppercase;
    width: 6em;
    line-height: 1;
    font-family: "Arial Black", Gadget, sans-serif;
    color: #FFF;
    position: absolute;
    left: 3%;
    top: 35%;
}

#home h2 {
    font-size: 1.1em;
    font-weight: normal;
    color: rgba(255, 255, 255, .9);
    position: absolute;
    left: 3%;
    top: calc(35% + 16em);
}

#about h1, #service h1, #portfolio h1 {
    font-size: 6.5em;
    text-transform: uppercase;
    line-height: 1;
    color: #FFF;
    padding-bottom: .25em;
}

#about p, #service p {
    color: rgba(255, 255, 255, .9);
    line-height: 1.5;
    font-size: 1.2em;
}

#about {
    padding-left: 50%;
    padding-right: 10%;
}

#service {
    padding-left: 7%;
    padding-right: 45%;
}

#portfolio {
    padding-left: 5%;
}

#portfolio ul li {
    list-style: none;
    display: inline-block;
    margin-right: 1.5em;
}

#portfolio article {
    display: none;
}

.portfolio-link {
    font-size: 0;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 3px solid #FFF;
    display: block;
    opacity: .6;
    transition: all .5s;
    -webkit-transition: all .5s;
}

.portfolio-link:hover {
    opacity: 1;
    width: 130px;
    height: 130px;
    transform: translateY(-15px);
    -webkit-transform: translateY(-15px);
}

#portfolio ul li:nth-child(1) a {
    background: url(../images/work1.jpg) no-repeat;
    background-size: cover;
}

#portfolio ul li:nth-child(2) a {
    background: url(../images/work2.jpg) no-repeat;
    background-size: cover;
}

#portfolio ul li:nth-child(3) a {
    background: url(../images/work3.jpg) no-repeat;
    background-size: cover;
}

#portfolio ul li:nth-child(4) a {
    background: url(../images/work4.jpg) no-repeat;
    background-size: cover;
}

#portfolio ul li:nth-child(5) a {
    background: url(../images/work5.jpg) no-repeat;
    background-size: cover;
}

#popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: all .25s;
    -webkit-transition: all .25s;
    visibility: hidden;
    opacity: 0;
}

#popup-content {
    position: absolute;
    z-index: 200;
    width: 900px;
    height: 440px;
    left: 50%;
    top: 50%;
    margin-left: -450px;
    margin-top: -220px;
    padding: 30px 50px;
    box-sizing: border-box;
    background: #FFF;
    box-shadow: 0 10px 15px rgba(0, 0, 0, .2);
    transition: all .5s;
    -webkit-transition: all .5s;
    transform: translateY(100px);
    -webkit-transform: translateY(100px);
}

#popup.show {
    visibility: visible;
    opacity: 1;
}

#popup-content.show {
    transform: translateY(0px);
    -webkit-transform: translateY(0px);
}

#popup-bg {
    position: absolute;
    z-index: 100;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .6);
}

#close {
    background: #E74C3C;
    width: 50px;
    height: 50px;
    border: 0;
    font-size: 0;
    position: absolute;
    right: 30px;
    top: 30px;
    z-index: 250;
}

#close:hover {
    background: #555;
}

#close::before, #close::after {
    content: '';
    width: 50px;
    height: 2px;
    background: #FFF;
    display: block;
}

#close::before {
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
}

#close::after {
    -webkit-transform: translateY(-2px) rotate(-45deg);
    transform: translateY(-2px) rotate(-45deg);
}

#popup-holder {
    padding-left: 400px;
    text-align: left;
}

#popup-holder img {
    position: absolute;
    left: 30px;
}

#popup-holder h2 {
    text-transform: uppercase;
    font-size: 4em;
    color: #1abc9c; /*绿色*/
    padding-bottom: .5em;
}

#popup-holder p {
    font-size: 1.15em;
    color: #777; /*灰色*/
    line-height: 1.5;
    margin-bottom: 1em;
}